The two versions of "Only Wanna Dance With You (Demo)" are actually different, despite being the same length. Basically, one has a longer introduction than the other and the other has a different ending and a shorter bridge.
Ladies and Gentlemen, we interrupt our program of dance music to bring you a special bulletin from the intercontinental radio news. Our very own pop princess, now queen of pop, has a special announcement she would like to make.
You mislead a base honey, Britney bitch is next door
I get Dido and ABBA (thank you, parents ), JT, okay, but Madge
At least you like the other gurls
Well I like Madge to a certain degree, I own Celebration Deluxe Edition and MDNA, I was a big fan last year Ray Of Light, Confessions >>>
ABBA has good songs but I've heard them all 100x on the radio
Mirrors slay though, but the rest of 20/20 didn't click with me
We have Ke$ha and the girls in common at least, as you said
), JT, okay, but Madge 
Ray Of Light, Confessions >>>